diff --git a/Dockerfile b/Dockerfile
index e963674a55eda713d915e846401447e762edfacd..eaa92f0c224cd14162a8a9bce1b9a4ef0684c4f3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -123,3 +123,4 @@ RUN cd ~ && \
 # Set the work dir and the container entry point
 WORKDIR /opt/mastodon
 ENTRYPOINT ["/tini", "--"]
+EXPOSE 3000 4000